mono/tests/gchandles.cs

   1 using System;
   2 using System.Runtime.InteropServices;
   3
   4 public class Test1
   5 {
   6         public GCHandle self;
   7         public static bool fail;
   8         public static Test1 instance;
   9
  10         ~Test1 () {
  11                 if (self.Target == null)
  12                         fail = true;
  13         }
  14 }
  15
  16 public class Test2
  17 {
  18         public GCHandle self;
  19         public static bool fail;
  20         public static Test2 instance;
  21
  22         ~Test2 () {
  23                 if (self.Target == null)
  24                         fail = true;
  25         }
  26 }
  27
  28 public class Tests
  29 {
  30         public static int Main (String[] args) {
  31                 return TestDriver.RunTests (typeof (Tests), args);
  32         }
  33
  34         static void create1 () {
  35                 Test1.instance = new Test1 ();
  36                 Test1.instance.self = GCHandle.Alloc (Test1.instance, GCHandleType.WeakTrackResurrection);
  37                 Test1.instance = null;
  38         }
  39
  40         public static unsafe int test_0_track_resurrection () {
  41                 /* The GCHandle should not be cleared before calling the finalizers */
  42                 create1 ();
  43                 GC.Collect ();
  44                 GC.WaitForPendingFinalizers ();
  45
  46                 // WaitForPendingFinalizers doesn't seem to work ?
  47                 System.Threading.Thread.Sleep (100);
  48                 /* If the finalizers do not get ran by this time, the test will still succeed */
  49                 return Test1.fail ? 1 : 0;
  50         }
  51
  52         static void create2 () {
  53                 Test2.instance = new Test2 ();
  54                 object o = new object ();
  55                 Test2.instance.self = GCHandle.Alloc (o, GCHandleType.WeakTrackResurrection);
  56                 Test2.instance.self.Target = Test2.instance;
  57                 Test2.instance = null;
  58         }
  59
  60         public static int test_0_track_resurrection_set_target () {
  61                 /* Same test but the handle target is set dynamically after it is created */
  62                 create2 ();
  63                 GC.Collect ();
  64                 GC.WaitForPendingFinalizers ();
  65
  66                 System.Threading.Thread.Sleep (100);
  67                 return Test2.fail ? 1 : 0;
  68         }
  69 }